Engineered Air HVAC Unit DG-150

Lubrication of Dodge Fan Bearings — Ball Bearing Pillow Block

Select the shaft diameter and speed (RPM) for lubrication schedule

Is it safe to re-lubricate while running?

Re-lubricate while running until some purging occurs at seals, if safe

Adjust lubrication frequency based on condition of purged grease

Record hours of operation, temperature, and surrounding conditions

Select the grease used for lubrication

Lubricate bearings prior to extended shutdown or storage

Clean screen of regulators with vent terminals

Remove scale from burner plates

Ensure burner plates and gas orifices are clear of foreign material

WARNING — This unit is connected to high voltages.

Electrical shock or death could occur if instructions are not followed.

This equipment contains moving parts that can start unexpectedly.

Injury or death could occur if instructions are not followed.

All work should be performed by a qualified technician.

Always disconnect and lock out power before servicing.

DO NOT bypass any interlock or safety switches under any circumstances.

WARNING — Follow the cleaning instructions and recommended inspection schedule to reduce the risk of mold or other bacterial growth.

Is the bearing rotating slowly?

Use lithium base lubricant for greasing

Ensure not to overgrease the bearings

Ensure not to use non-lithium based grease

Select the shaft diameter and apply the correct grease quantity

Refer to the fan and/or bearing manufacturers’ literature for additional information

Check the conditions chart for re-greasing interval

Close the upstream manual gas valve

Connect a ¼” (6mm) tube to the outlet pressure tap on the safety shutoff valve

Immerse the opposite end of the ¼” (6mm) tube vertically ½” (13mm) into a clear container of water

Count the number of bubbles appearing during a 10 second period

Is the bubble rate greater than that noted in the manufacturer's table?

If the bubble rate is greater than noted, choose the action taken

If bubble rate is less than noted, remove the ¼” (6mm) tube and reconnect the outlet pressure tap plug